US7496949B2 - Network system, proxy server, session management method, and program - Google Patents

Network system, proxy server, session management method, and program Download PDF

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Publication number
US7496949B2
US7496949B2 US11/592,188 US59218806A US7496949B2 US 7496949 B2 US7496949 B2 US 7496949B2 US 59218806 A US59218806 A US 59218806A US 7496949 B2 US7496949 B2 US 7496949B2
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Prior art keywords
server
authentication
request
client
user
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US11/592,188
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US20070067834A1 (en
Inventor
Tsuguharu Saito
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NEC Corp
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NEC Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0884—Network architectures or network communication protocols for network security for authentication of entities by delegation of authentication, e.g. a proxy authenticates an entity to be authenticated on behalf of this entity vis-à-vis an authentication entity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services

Definitions

  • the present invention relates to a network system, a proxy server, a session management method, and a program for communications using an active proxy.
  • LECP profile has the similar problem and it is difficult to realize such a specification, especially, in a session management method using cookies.
  • proxy server As examples of the related art of a proxy server, there are “system including proxy server and web server and program therefor” in which, when a web server in a coverage area does not return response information, a web client is informed the reason why the web server is stopped and estimated time for restarting, instead of a conventional error return (see, for example, Japanese Patent Application Laid-Open No. 2002-259338) and “proxy server and proxy control system” which suppress effects on other traffics in a network when obtaining content from an origin server (see, for example, Japanese Patent Application Laid-Open No. 2003-256321).
  • the present invention has been developed in view of the above problems and has an object of providing a network system, a proxy server, a session management method, and a program which enable to maintain sessions completely by managing sessions in a proxy server.
  • the first aspect of the invention is a network system, including a client, a proxy server, and at least two web servers.
  • the client and the proxy server, and the at least two web servers are connected to each other via a communication network, and the proxy server includes a session management means for maintaining a session of the at least two web servers.
  • the second aspect of the invention is the network system in which, upon receiving a predetermined request from an authenticated client, the session management means stores user information of the client, server information indicating a target web server of the request, and session information received from the web server and associates them each other.
  • the third aspect of the invention is the network system in which the proxy server includes a user authentication means for carrying out user authentication of the client based on identification information received from the client, and the session management means stores, as the user information, the user authenticated by the user authentication means.
  • the fourth aspect of the invention is the network system in which the session management means stores, as the user information, an IP address received from the client.
  • the fifth aspect of the invention is the network system, further including an authentication server for carrying out user authentication of the client and informing the proxy server of an authentication result.
  • the session management means stores, as the user information, the user authenticated by the authentication server.
  • the sixth aspect of the invention is the network system, in which the proxy server includes a protocol conversion means for converting a current protocol in use into another protocol.
  • the seventh aspect of the invention is the network system in which the proxy server includes a security means for authenticating the client and the web server.
  • the eighth aspect of the invention is a proxy server for proxy receiving in response to a request addressed to a predetermined web server from a client, in which a session management means for maintaining a session of the web server is included.
  • the ninth aspect of the invention is the proxy server in which, upon receiving a predetermined request from an authenticated client, the session management means associates and stores user information of the client, server information indicating a subject web server of the request, and session information received from the web server.
  • the tenth aspect of the invention is the proxy server in which the proxy server includes a user authentication means for carrying out user authentication of the client based on identification information received from the client, and the session management means stores, as the user information, the user authenticated by the user authentication means.
  • the eleventh aspect of the invention is the proxy server in which the session management means stores, as the user information, an IP address received from the client.
  • the twelfth aspect of the invention is the proxy server, further including an authentication server for carrying out user authentication of the client and informing the proxy server of an authentication result.
  • the session management means stores, as the user information, the user authenticated by the authentication server.
  • the thirteenth aspect of the invention is the proxy server, further including a protocol conversion means for converting a current protocol in use into another protocol.
  • the fourteenth aspect of the invention is the proxy server, further including a security means for authenticating the client and the web server.
  • the fifteenth aspect of the invention is a session management method, in which a proxy server for proxy receiving a request addressed to a predetermined web server from a client maintains a session of the web server.
  • the sixteenth aspect of the invention is the session management method in which, upon receiving a predetermined request from an authenticated client, the proxy server associates and stores user information of the client, server information indicating a subject web server of the request, and session information received from the web server.
  • the seventeenth aspect of the invention is the session management method in which the proxy server carries out user authentication of the client based on identification information received from the client and stores the authenticated user as the user information.
  • the eighteenth aspect of the invention is the session management method in which an IP address received from the client is stored as the user information.
  • the nineteenth aspect of the invention is the session management method, further including storing, as the user information, a user authenticated by an authentication server, which carries out user authentication of the client and informs the proxy serve of an authentication result.
  • the twentieth aspect of the invention is the session management method in which the proxy server converts a current protocol in use into another protocol.
  • the twenty first aspect of the invention is the session management method in which the proxy server authenticates the client and the web server.
  • the twenty second aspect of the invention is a computer program product, when executed, causing a proxy server to carry out a session management process for maintaining a session in a web server.
  • the twenty third aspect of the invention is the computer program product in which, in the session management process, upon receiving a predetermined request from an authenticated client, the proxy server is made to associate and store user information of the client, server information indicating a subject web server of the request, and session information received from the web server.
  • the twenty fourth aspect of the invention is the computer program product in which the proxy server is made to carry out a user authentication process for authenticating the client based on identification information received from the client, and in the session management process, the proxy server is made to store, as the user information, the user authenticated in the user authentication process.
  • the twenty fifth aspect of the invention is the computer program product in which, in the session management process, the proxy server is made to carry out a process for storing, as the user information, an IP address received from the client.
  • the twenty sixth aspect of the invention is the computer program product in which, in the session management process, the proxy server is made to carry out a process to store, as the user information, a user authenticated by an authentication server, which carries out user authentication of the client and informs the proxy server of an authentication result.
  • the twenty seventh aspect of the invention is the computer program product in which the proxy server is made to carry out a protocol conversion process for converting a current protocol in use into another protocol.
  • the twenty eighth aspect of the invention is the computer program product in which, the proxy server is made to carry out a security process for authenticating the client and the web server.
  • sessions can be maintained securely even when a proxy server actively accesses to a plurality of servers.
  • FIG. 1 is a view showing a structure of a network system according to the first embodiment of the present invention
  • FIG. 2 is a view showing a session management function of a proxy server according to the first embodiment of the present invention.
  • FIG. 3 is a sequence diagram showing an operation according to the first embodiment of the present invention.
  • a private network 20 such as a LAN
  • a proxy server 10 connected to the private network 20
  • a client terminal device (hereinafter, referred to as “client”) 11 which is a typical information processing terminal device such as a personal computer and is connected to the private network 20
  • client a client terminal device
  • wide area network 21 such as the Internet via a GW (gateway) 12
  • the wide area network 21 is connected to a server A 13 and a server B 14 .
  • the proxy server 10 of the present embodiment is configured to receive a request from the client 11 and access to the server A 13 .
  • the proxy server 10 includes a session management function 30 for authenticating a user of the client 11 , identifying the user of the client 11 , and storing user information indicating the identified user associated with session information of the server A 13 .
  • the session management function 30 is configured to store user information indicating the user of the client 11 , server information indicating a request target server, and session information of the request target server together.
  • the proxy server 10 is configured to extract the session information of the request target server from the session management function 30 based on the session information related to the request target server in response to a request from the user of the client 11 and add the session information to the request from the client 11 .
  • the proxy server 10 is configured to add information indicating that the access to the server A 13 is carried out via a proxy.
  • the proxy server 10 When receiving a request addressed to the server B 14 from the server A 13 , the proxy server 10 is configured to transfer a request received from the server A 13 to the server B 14 .
  • the proxy server 10 is configured to transfer a response addressed to the server A 13 from the server B 14 to the server A 13 .
  • the client 11 is configured to transmit a request to a predetermined server via the proxy server 10 and receive information from the predetermined server.
  • the client 11 is configured to transmit user's input to the request source server when a request of, for example, authentication is inputted.
  • the server A 13 and the server B 14 are typical web servers and configured to receive a request from the client 11 and transmit a response according to the request.
  • the server A 13 When the request includes information that the access is carried out via the proxy, the server A 13 returns to the proxy server 10 information that a request is to be sent to the server B 14 .
  • the server B 14 is configured to receive the request from the server A 13 , which is transmitted via the proxy server 10 , and return information according to the request.
  • access to the server B 14 is implemented after the proxy server 10 authenticates the user of the client 11 .
  • the content of the access is not particularly limited.
  • a user authentication is carried out.
  • a request for confidential information is sent to the server A 13 .
  • the server A 13 checks whether the user of the client 11 as a request source is authenticated by the server B 14 .
  • the server A 13 confirms that the user of the client 11 is authenticated by the server B 14 , the server A 13 transmits the confidential information to the client 11 .
  • the client 11 accesses the proxy server 10 (step S 100 ). Then, the proxy server 10 requests the client 11 a user authentication (step S 101 ).
  • the user of the client 11 inputs identification information such as an ID and a password, the identification information being previously registered to the proxy server 10 , and transmits the information to the proxy server 10 (step S 102 ).
  • this authentication method is not limited to an ID and a password and may employ conventional authentication methods.
  • the proxy server 10 confirms (authenticates) the ID and the password transmitted from the client 11 in step S 102 and transmits an authentication key that indicates the completion of the authentication to the client 11 (step 103 ).
  • the client 11 transmits an authentication request addressed to the server B 14 to the proxy server 10 with the authentication key transmitted in step S 103 (step S 104 ).
  • the proxy server 10 transfers the request from the client 11 to the server B 14 (step S 105 ).
  • the server B 14 When receiving the authentication request of the client 11 transferred by the proxy server 10 , the server B 14 authenticates and then returns an authentication result and session information (step S 106 ).
  • the proxy server 10 associates the session information returned from the server B 14 with information of the user of the client 11 and the server B 14 and registers them to the session management function 30 . In addition, the proxy server 10 transfers the authentication result returned from the server B 14 to the client 11 (step S 107 ).
  • the client 11 After the client 11 confirms that the authentication is completed in the server B 14 according to the authentication result, the client 11 transmits a confidential information request addressed to the server A 13 to the proxy server 10 together with the authentication key transmitted in step S 103 (step S 108 ).
  • the proxy server 10 After confirming the authentication key, the proxy server 10 transfers the request from the client 11 to the server A 13 . Further, when transferring, the proxy server 10 adds information that the access is carried out via a proxy to the request (step S 109 ).
  • the server A 13 receives the request of the client 11 transferred by the proxy server 10 .
  • the server A 13 transmits to the proxy server 10 a request for authentication confirmation addressed to the server B 14 (step S 110 ).
  • the proxy server 10 When receiving the request for authentication confirmation addressed to the server B 14 and session information of the server A 13 from the server A 13 , the proxy server 10 associates the session information of the server A 13 with the information of the user of the client 11 and the server A 13 to register them to the session management function 30 and to extract the session information of the user of the client 11 and the server B 14 from the session management function 30 .
  • the proxy server 10 transfers the request for authentication confirmation addressed to the server B 14 from the server A 13 and the session information of the server B 14 extracted from the session management function 30 to the server B 14 (step S 111 ).
  • the server B 14 confirms that the received session information is of the user authenticated in step S 106 and returns a result that the user is authenticated (step S 112 ).
  • the proxy server 10 transfers the result returned in step S 112 to the server A 13 together with the session information of the server A 13 extracted from the session management function 30 (step S 113 ).
  • the server A 13 recognizes it as a response to the request for authentication confirmation that was addressed to the server B 14 requested in step 110 based on the session information and returns the confidential information to the proxy server 10 (step S 114 ).
  • the proxy server 10 transfers the response from the server A 13 to the client 11 (step S 115 ).
  • the client 11 can receive the confidential information from the server A 13 while the sessions are maintained in an active proxy.
  • sessions can be maintained in the sequence shown in FIG. 3 although it was impossible in a normal session management by a client.
  • a conventional proxy server which does not perform session management can not recognize that the request in step S 105 and the request in step S 111 in FIG. 3 are requests transmitted from the same client. This happens because the request is addressed to the server B 14 in the step S 104 and the request is addressed to the server A 13 in step S 108 .
  • a plurality of servers can work in cooperation.
  • the authentication is confirmed for the server B 14 ; however, requests should not be used only for authentications.
  • the server A 13 is adapted to authenticate the client 11 without using the authentication information of the client 11 .
  • the second embodiment of the present invention employs an IP address for identification of the client 11 in a session management function 30 although the first embodiment employs an authentication in proxy server 10 .
  • the processes in steps S 100 to S 103 can be omitted and an IP address is used as an identifier for registering with and obtaining from the session management function 30 .
  • the third embodiment of the present invention shows a case where the client 11 is a mobile telephone.
  • the private network 20 such as a LAN in FIG. 1 is a mobile telephone communication network and an authentication server such as a WAP server is provided in addition to the proxy server 10 .
  • a user authentication is performed in the WAP server, and a telephone number or the like can be used as an identifier to identify the client 11 .
  • a private network 20 such as a LAN or a GW 12 is not required, so even when the client 11 and the proxy server 10 are located in a wide area network 21 such as the Internet, they can be used in the same way.
  • additional functions are provided to the proxy server 10 .
  • a protocol conversion function or a security function is added to the proxy server 10 as an additional function.
  • the protocol conversion function enables accesses using protocols other than an IP for an ISDN dedicated network that is not the Internet.
  • the security function enables an authentication of a client or a server by using, for example, an SSL (Secure Sockets Layer) communication function so that session management can be performed similar to the first embodiment.
  • SSL Secure Sockets Layer

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Computer Security & Cryptography (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer And Data Communications (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
US11/592,188 2005-11-04 2006-11-03 Network system, proxy server, session management method, and program Expired - Fee Related US7496949B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005321316A JP4670598B2 (ja) 2005-11-04 2005-11-04 ネットワークシステム、プロキシサーバ、セッション管理方法、及びプログラム
JP2005-321316 2005-11-04

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US20070067834A1 US20070067834A1 (en) 2007-03-22
US7496949B2 true US7496949B2 (en) 2009-02-24

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US (1) US7496949B2 (fr)
EP (1) EP1788778B1 (fr)
JP (1) JP4670598B2 (fr)
AU (1) AU2006235867A1 (fr)
ES (1) ES2342557T3 (fr)
RU (1) RU2344473C2 (fr)
TW (1) TW200719162A (fr)

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US20230291716A1 (en) * 2017-06-26 2023-09-14 Open Text Corporation Systems and methods for providing communications between on-premises servers and remote devices

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US9313203B2 (en) * 2013-03-15 2016-04-12 Symantec Corporation Systems and methods for identifying a secure application when connecting to a network
US9167427B2 (en) * 2013-03-15 2015-10-20 Alcatel Lucent Method of providing user equipment with access to a network and a network configured to provide access to the user equipment
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KR20130052373A (ko) * 2011-11-11 2013-05-22 삼성전자주식회사 서버와 디바이스를 중개하는 방법 및 장치, 컴퓨터로 읽을 수 있는 기록 매체
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RU2344473C2 (ru) 2009-01-20
JP4670598B2 (ja) 2011-04-13
US20070067834A1 (en) 2007-03-22
RU2006138963A (ru) 2008-05-10
AU2006235867A1 (en) 2007-05-24
TW200719162A (en) 2007-05-16
EP1788778B1 (fr) 2010-03-17
EP1788778A1 (fr) 2007-05-23
JP2007128349A (ja) 2007-05-24
ES2342557T3 (es) 2010-07-08

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